If we had taken such effective measures much earlier, the river ________ so seriously now.
#86813
A
is not polluted
B
would not be polluted
C
had not been polluted
D
would not have been polluted
推荐题目
______ it______ for your help，I couldn't have made any progress．
#86915
A
Had；not been
B
Should；not been
C
Did；not been
D
Not；be
If the president had visited the hospital this morning, it ________ the headline in tomorrow's paper.
#87202
A
will be
B
could be
C
had been
D
was
. If my father ______ here yesterday, he would have stopped me from going surfing.
#86775
A
had been
B
were
C
should be
D
has been
When Marx was in London, he _____ read at the library for hours.
#90099
A
would
B
might
C
could
D
should